🏷️ LIMITED TIME OFFER: GET 20% OFF GRADE+ YEARLY SUBSCRIPTION →
Log in
Physics
2
answers
0
watching
137
views
4 Dec 2020

Question:  Starting from a rest position, John paddles his bicycle to achieve a velocity of 6 m/s in 30 sec. Then, he applies brakes such that the velocity of the bicycle decreases to 4m/s in the next 5 sec. What is the acceleration of the bicycle in both the cases.

Booster class
Mechanics 1
Skill
Understanding the basics of motion and acceleration
Watch
2
answers
0
watching
137
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share
Rishabh Jain
Rishabh JainLv6
4 Dec 2020
Already have an account? Log in
Share

Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

1) Suppose you are riding a stationary exercise bicycle,andthe electronic meter indicates that the wheel is rotating at9.62rad/s. The wheel has a radius of 0.440 m. If you ride the bikefor44.7 min, how far would you have gone if the bike couldmove?
2) A planet orbits a star, in a year of length 2.34x107 s, in a nearly circular orbit of radius 1.78x1011 m. With respect to the star,determine(a) the angular speed of theplanet,(b) the tangential speed of the planet,and(c) the magnitude and direction of theplanet'scentripetal acceleration.
3) A person is riding a bicycle, and its wheels have anangularvelocity of 15.8 rad/s. Then, the brakes are applied andthe bike isbrought to a uniform stop. During braking, the angulardisplacementof each wheel is 14.2 revolutions.(a) How muchtime does it take for the bike tocome to rest? (b)What is the anguar acceleration(in rad/s2) of eachwheel?

hi,

i have 5 questions i need the

complete solutions with their final results. is there anyonecouldhelp

me, i would appreciate that.



1)

Consider a point on a bicycle wheel as the wheel turns about afixedaxis, neither speeding up nor slowing down. Compare thelinear andangular velocities of the point.

2)
A point on the rim of a 0.25-m-radius rotating wheel hasacentripetal acceleration of 4.0 m/s2. What is the angular speedofthe wheel?

3)
A point on the rim of a 0.15-m-radius rotating disk hasacentripetal acceleration of 5.0 m/s2. What is the angular speedofa point 0.075 m from the center of the disk?


4)
A 0.150-m-radius grinding wheel, starting at rest, developsanangular speed of 12.0 rad/s in a time interval of 4.00 s. Whatisthe centripetal acceleration of a point 0.100 m from thecenterwhen the wheel is moving at an angular speed of 12.0rad/s?


5)

What centripetal force does an 80-kg passenger experiencewhenseated 12 m from the center of a Ferris wheel whose angularspeedis 0.50 rad/s?






thank you in advance

A CD with a diameter of 12.0 cm starts from rest and with aconstant angular acceleration of 1.0 rad/sec2 acquires an angularvelocity of 5.0 rad/sec. The CD continues rotating at 5.0 rad/secfor 15.0 seconds and then slows to a stop in 12.0 seconds with aconstant angular deceleration. What is the tangential velocity of apoint 4.0 cm from the center at the time 2.0 seconds from thestart?

A. 0.060 m/s
B. 0.080 m/s
C. 0.10 m/s
D. 0.14 m/s
E. 0.18 m/s

Weekly leaderboard

Home
Homework Help 3,900,000
Physics 110,000
Start filling in the gaps now
Log in